我们只有绿卡,现在想办公民,大概多久可以办下来?
-It may take several months to one year, case by case.
然后给父母申请绿卡,请问大概需要多长时间?
-Case by case, normally one to two years.
父母年纪大了,已过八十,是否会影响申请绿卡?
-No.